Filling yarn control means



May 4, 1965 w. J. CARROLL FILLING YARN CONTROL MEANS Filed Feb. 6, 1964 LINVENTOR: W|LL|AM JACK CARROLL.

WJM JL ZA #104. ATTORNEYS United States Patent 0 3,181,569 FILLING YARN CONTROL MEANS William J. Carroll, Asheville, N.C., assignor to Beacon Manufacturing Company, a corporation of Delaware Filed Feb. 6, 1964, Ser. No. 343,093 2 Claims. (Cl. 139-122) This invention relates to improved filling yarn control means and more particularly to an improved filling y arn control means for use on a Sulzer Loom.

Sulzer Looms of the type utilizing a plurality of spools of filling yarns are now well known. These looms conventionally use control means or braking devices for the filling yarns which are cyclically inserted from separate spools of yarn for reasons known to those with ordinary skill in the art.

These control means or braking devices are illustrated in the Pfarrwaller patent, US. No. 2,749,946, issued June 12, 1956. As shown in that patent, the braking device consisted of a flexible or yielding brake band and a movable, cam operated brake shoe. The respective filling yarns are each fed between a flexible brake band and a movable brake shoe for insertion into the shuttle of the loom. When a particular filling yarn is in use in the loom shuttle, the movable brake shoe is cammed away from contact with the flexible brake band leaving the filling yarn free to move between them. When a particular filling yarn is not being used by the loom shuttle, the movable brake shoe is cammed into contact with the flexible brake band to clamp the filling yarn therebetween.

A problem of wear in the flexible brake band arose in these Sulzer Looms due to the repeating contact of the brake shoe with the brake band. The brake bands wear out in a relatively short time and frequent replacements are necessary causing loss of time and expense.

It is a specific object of this invention to provide a filling yarn control means or braking device which will overcome the aforementioned problems.

This invention provides a spring biased, cam operated disc braking device or control means which will not wear out as quickly and therefore save both time and expense to the manufacturer.

Further features of this invention will be understood from the following more detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a diagrammatic perspective view of the filling yarn control means or braking devices according to this invention.

FIG. 2 is a top plan view of a portion of the mechanisms of FIG. 1.

FIG. 3 is a view taken along the lines 33 of FIG. 2.

FIG. 4 is a view taken along the lines 4-4 of FIG. 2.

Referring now to the drawings, the novel braking mechanism of this invention as used on Sulzer Looms is generally indicated in FIG. 1 by the reference numeral 16. The braking device includes a plurality of individual braking devices 11 for each of the filling yarns 12 used and two of these are illustrated in FIG. 1, but it is to be understood that a Sulzer Loom may employ more of the braking devices.

The braking devices 11 comprise a rectangular shaped bracket 13 having eyelets 14 therein for the passage of a filling yarn 12. Secured to one side of the bracket 13 is a threaded shaft 15 having nuts 16 and 17 thereon. On the opposite side of the bracket 13 is a movable shaft 18 disposed in aperture 19. The shaft 18 has a slot 20 for the passage of a filling yarn 12. A first braking disc 21 is immovably secured to the bracket 13 around the aperture 19 and movable shaft 18. For cooperation with the braking disc 21, the movable shaft carries a braking disc 22 secured thereto and adapted to contact the disc 3,181,569 Patented May 4, 1965 21 to brake or stop the movement of a filling yarn 12. A coil spring 23 is disposed between movable shaft 18 and fixed shaft 15 to bias the movable shaft 18 to the left as viewed in FIG. 2 and thereby bias the movable braking disc 22 into contact with the stationary braking disc 21.

For purposes of moving the braking disc 22 out of contact with braking disc 21 to release the filling yarn 12 for use in the loom shuttle, the movable shaft 18 has a cam surface 24- on one end thereof. Cooperating With the cam surface 24 to move the shaft 18 and the disc 22 is a cam member 25. The cam member 25 is carried by lever arm 26 which is pivoted at 27 to the loom frame. The lever arm 26 is moved by a connecting arm 28 which is pivoted at one end to the lever arm 26 and carries a cam follower 29 at the opposite end. The connecting arm 28 is pivoted to a second lever arm 30 which is pivoted to the loom frame. For moving the above described lever arm and cam member 25, the cam follower 29 is biased by a spring 31 against a cam 32 driven by a rotating shaft 33.

In operation, the cam 32 will rotate to move the connecting arm toward or away from the cam 32, as viewed in FIG. 1, according to whether the cam follower 29 is in contact with a high or low portion of the cam 32. If the cam follower 29 is on the low ortion of the cam 32, as shown on the left side of FIG. 1, the connecting memher will move toward the cam 32 pivoting lever arm 26 and cam member 25 upwardly away from the cam surface 24, thereby allowing disc 22 to contact disc 21 through the action of spring 23 to brake or stop a filling yarn 12, as shown in FIG. 2. If the cam follower 29 is in the high portion of the cam 32, as shown on the right side of FIG. 1, the connecting member will move away from the cam 32 pivoting lever arm 26 and cam member 25 downwardly into contact with the cam surface 24, as shown in FIG. 3, to move the shaft 18 and disc 22 out of contact with disc 21 to release a filling yarn 12 for use in the loom shuttle.

This invention has provided an effective means for controlling or braking the filling yarns in a Sulzer Loom which eliminates the problem of excessive wear thus reducing replacements and expense to the manufacturer.

This invention has been described in detail above for purposes of illustration only and is not intended to be limited by this description or otherwise except as defined in the appended claims.

What is claimed is:

1. A filling yarn control means for use on a Sultzer Loom comprising a bracket having eyelets therein for the passage of a filling yarn therethrough and an aperture in one side thereof, a first hollow braking disc fixed to said bracket and disposed around said aperture, a movable shaft slidably disposed in said aperture in said bracket and having a cam surface on one end thereof, a second braking disc in operative engagement with said movable shaft to be moved thereby and adapted to contact said first braking disc to clamp and stop the movement of the filling yarn, said movable shaft having an elongate slot therein for the passage of thread therethrough to insure that the filling yarn always passes between said first and second discs, spring means normally biasing said second braking disc into clamping contact with said first braking disc, and a constantly operating cam mechanism adapted to intermittently contact said cam surface to move said shaft and said second braking disc against the bias of said spring means out of contact with said first braking disc to release the filling yarn for free unobstructed movement into the loom mechanisms.

2. A filling yarn control means for use on a loom com prising mounting means, a first braking disc means carried by said mounting means, a second braking disc means movably supported on said mounting means and normally biased into engagement with said first braking disc means References Cited by the Examiner UNITED STATES PATENTS V Fletcher 139123 Parry et al 242-150 Heizer 242-150 Pfa'rrwaller 1 3 9-126 DONALD' W. PARKER'Primai-y Examiner. 

1. A FILLING YARN CONTROL MEANS FOR USE ON A SULTZER LOOM COMPRISING A BRACKET HAVING EYELETS THEREIN FOR THE PASSAGE OF A FILLING YARN THERETHROUGH AND AN APERTURE IN ONE SIDE THEREOF, A FIRST HOLLOW BRAKING DISC FIXED TO SAID BRACKET AND DISPOSED AROUND SAID APERTURE, A MOVABLE SHAFT SLIDABLY DISPOSED IN SAID APERTURE IN SAID BRACKET AND HAVING A CAM SURFACE ON ONE END THEREOF, A SECOND BRAKING DISC IN OPERATIVE ENGAGEMENT WITH SAID MOVABLE SHAFT TO BE MOVED THEREBY AND ADAPTED TO CONTACT SAID FIRST BRAKING DISC TO CLAMP AND STOP THE MOVEMENT OF THE FILLING YARN, SAID MOVABLE SHAFT HAVING AN ELONGATE SLOT THEREIN FOR THE PASSAGE OF THREAD THERETHROUGH TO INSURE THAT THE FILLING YARN ALWAYS PASSES BETWEEN SAID FIRST AND SECOND DISCS, SPRING MEANS NORMALLY BIASING SAID SECOND BRAKING DISC INTO CLAMPING CONTACT WITH SAID FIRST BRAKING DISC, AND A CONSTANTLY OPERATING CAM MECHANISM ADAPTED TO INTERMITTENTLY CONTACT SAID CAM SURFACE TO MOVE SAID SHAFT AND SAID SECOND BRAKING DISC AGAINST THE BIAS OF SAID SPRING MEANS OUT OF CONTACT WITH SAID FIRST BRAKING DISC TO RELEASE THE FILLING YARN FOR FREE UNOBSTRUCTED MOVEMENT INTO THE LOOM MECHANISMS. 